See below code worked for me:

var gr = new GlideRecord('sysapproval_approver');

gr.setLimit(100);

gr.addQuery('sysapproval.sys_class_name=sc_req_item');

gr.OrderBy('sysapproval.request.number');

gr.query();

while(gr.next())

{

  gs.log('Number '+gr.sysapproval.request.number);

}

Thank you,

Ashutosh Munot

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